8 February 2015 Magnetotransport potentials for anisotropic thin films with stripline and ground plane contacts
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Abstract
Superlattice layers in infrared emitters and detectors can be highly anisotropic in their electrical properties, and proper characterization of their in-plane and cross-plane transport can reveal information about the band structure, doping density, impurities, and carrier lifetimes. This work introduces numerical simulation methods for the potential distribution in an anisotropic resistive layer representing a suplerlattice, using both and non-conformal and conformal mapping to simplify the calculation of the potential int he presence of a magnetic field. A shingle strip-line contact is modeled atop the resistive superlattrive layer of interest, which, in turn, contact with a highly conducting back-plane and magnetic field-dependent Neumann boundary conditions at the floating front-plane. To increase cpomputational efficiency, non-conformal an conformal mapping are combined to transform the problem of an intractable infinitely wide anisotropic thin-film smaple to calculable, finite isotropic rectangular shape. The potential calculations introduced here should prove useful for deducing the full conductivity tensor of the superlattice region, including in-plane, cross-plane, and transverse conductivity tensor components.
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Yang Tang, M. Grayson, "Magnetotransport potentials for anisotropic thin films with stripline and ground plane contacts", Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93700L (8 February 2015); doi: 10.1117/12.2084489; https://doi.org/10.1117/12.2084489
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